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Radeon HD 7870 XT vs Radeon RX 5500

Intro

The Radeon HD 7870 XT features a core clock frequency of 925 MHz and a GDDR5 memory frequency of 1500 MHz. It also makes use of a 256-bit memory bus, and makes use of a 28 nm design. It is made up of 1536 SPUs, 96 TAUs, and 32 Raster Operation Units.

Compare those specs to the Radeon RX 5500, which has a core clock speed of 1670 MHz and a GDDR6 memory speed of 14000 MHz. It also features a 128-bit memory bus, and makes use of a 7 nm design. It is comprised of 1408 SPUs, 88 Texture Address Units, and 32 ROPs.

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Power Usage and Theoretical Benchmarks

Power Consumption (Max TDP)

Radeon RX 5500 150 Watts
Radeon HD 7870 XT 185 Watts
Difference: 35 Watts (23%)

Memory Bandwidth

Theoretically speaking, the Radeon RX 5500 should perform just a bit faster than the Radeon HD 7870 XT overall. (explain)

Radeon RX 5500 229376 MB/sec
Radeon HD 7870 XT 192000 MB/sec
Difference: 37376 (19%)

Texel Rate

The Radeon RX 5500 will be much (more or less 65%) faster with regards to anisotropic filtering than the Radeon HD 7870 XT. (explain)

Radeon RX 5500 146960 Mtexels/sec
Radeon HD 7870 XT 88800 Mtexels/sec
Difference: 58160 (65%)

Pixel Rate

The Radeon RX 5500 is much (approximately 81%) better at full screen anti-aliasing than the Radeon HD 7870 XT, and also capable of handling higher resolutions more effectively. (explain)

Radeon RX 5500 53440 Mpixels/sec
Radeon HD 7870 XT 29600 Mpixels/sec
Difference: 23840 (81%)

Please note that the above 'benchmarks' are all just theoretical - the results were calculated based on the card's specifications, and real-world performance may (and probably will) vary at least a bit.

Price Comparison

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Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 5500

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

Specifications

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Model Radeon HD 7870 XT Radeon RX 5500
Manufacturer AMD AMD
Year November 2012 October 2019
Code Name Tahiti LE Navi 14 XT
Memory 2048 MB 4096 MB
Core Speed 925 MHz 1670 MHz
Memory Speed 6000 MHz 28000 GB/s
Power (Max TDP) 185 watts 150 watts
Bandwidth 192000 MB/sec 229376 MB/sec
Texel Rate 88800 Mtexels/sec 146960 Mtexels/sec
Pixel Rate 29600 Mpixels/sec 53440 Mpixels/sec
Unified Shaders 1536 1408
Texture Mapping Units 96 88
Render Output Units 32 32
Bus Type GDDR5 GDDR6
Bus Width 256-bit 128-bit
Fab Process 28 nm 7 nm
Transistors 4313 million 6400 million
Bus PCIe 3.0 x16 PCIe 4.0 ×16
DirectX Version DirectX 11.1 DirectX 12
OpenGL Version OpenGL 4.3 OpenGL 4.6

Memory Bandwidth: Memory bandwidth is the maximum amount of data (in units of megabytes per second) that can be transported past the external memory interface within a second. The number is worked out by multiplying the bus width by the speed of its memory. If the card has DDR type RAM, it should be multiplied by 2 again. If DDR5, multiply by 4 instead. The better the memory bandwidth, the faster the card will be in general. It especially helps with anti-aliasing, High Dynamic Range and high resolutions.

Texel Rate: Texel rate is the maximum amount of texture map elements (texels) that are applied per second. This number is calculated by multiplying the total amount of texture units by the core speed of the chip. The better the texel rate, the better the graphics card will be at handling texture filtering (anisotropic filtering - AF). It is measured in millions of texels processed in one second.

Pixel Rate: Pixel rate is the most pixels the graphics card can possibly record to the local memory in a second - measured in millions of pixels per second. The number is worked out by multiplying the amount of Render Output Units by the the core clock speed. ROPs (Raster Operations Pipelines - sometimes also referred to as Render Output Units) are responsible for filling the screen with pixels (the image). The actual pixel rate also depends on lots of other factors, especially the memory bandwidth - the lower the memory bandwidth is, the lower the ability to get to the max fill rate.

Display Prices

Hide Prices

Radeon HD 7870 XT

Amazon.com

Check prices at:

Radeon RX 5500

Amazon.com

Check prices at:

Please note that the price comparisons are based on search keywords - sometimes it might show cards with very similar names that are not exactly the same as the one chosen in the comparison. We do try to filter out the wrong results as best we can, though.

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